Open AccessMotion-Based Acuity Task: Full Visual Field Measurement of Shape and Motion Perception
Author(s) -
Anna Kozak,
Michał Wieteska,
Marco Ninghetto,
Kamil Szulborski,
Tomasz Gałecki,
Jacek P. Szaflik,
Kalina Burnat
Publication year - 2021
Publication title -
translational vision science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.508
H-Index - 21
ISSN - 2164-2591
DOI - 10.1167/tvst.10.1.9
Subject(s) - visual acuity , computer vision , motion perception , visual field , artificial intelligence , contrast (vision) , peripheral vision , optometry , psychophysics , motion (physics) , computer science , achromatopsia , perception , ophthalmology , medicine , psychology , retinal , neuroscience
Purpose Damage of retinal representation of the visual field affects its local features and the spared, unaffected parts. Measurements of visual deficiencies in ophthalmological patients are separated for central (shape) or peripheral (motion and space perception) properties, and acuity tasks rely on stationary stimuli. We explored the benefit of measuring shape and motion perception simultaneously using a new motion-based acuity task. Methods Eight healthy control subjects, three patients with retinitis pigmentosa (RP; tunnel vision), and 2 patients with Stargardt disease (STGD) juvenile macular degeneration were included. To model the peripheral loss, we narrowed the visual field in controls to 10 degrees. Negative and positive contrast of motion signals were tested in random-dot kinematograms (RDKs), where shapes were separated from the background by the motion of dots based on coherence, direction, or velocity. The task was to distinguish a circle from an ellipse. The difficulty of the task increased as ellipse became more circular until reaching the acuity limit. Results High velocity, negative contrast was more difficult for all, and for patients with STGD, it was too difficult to participate. A slower velocity improved acuity for all participants. Conclusions Proposed acuity testing not only allows for the full assessment of vision but also advances the capability of standard testing with the potential to detect spare visual functions. Translational Relevance The motion-based acuity task might be a practical tool for assessing vision loss and revealing undetected, undamaged, or strengthened properties of the injured visual system by standard testing, as suggested here for two patients with STGD and three patients with RP.